What is the longest day in a year?

The longest day in a year is the summer solstice. ?

On the day of summer solstice, the height of the noon sun is the highest in all parts of the northern hemisphere north of the Tropic of Cancer, and the daytime reaches the longest in a year. After the summer solstice, the height of the sun decreases day by day. However, for places south of the Tropic of Cancer in the northern hemisphere, sunshine is still increasing after the summer solstice.

Summer solstice, the 10 solar term in 24 solar terms. Fighting means noon; The yellow meridian of the sun is 90 degrees; Gregorian calendar June 2 1-22. The summer solstice is the culmination of the sun's northward movement. On this day, the sun shines directly on the Tropic of Cancer, and then the point of direct sunlight moves south.

The custom of summer solstice

1, eat noodles on the solstice in summer.

In old Beijing, there is a saying that "winter solstice, summer solstice, jiaozi has noodles". On the solstice of summer, most Beijingers choose to eat noodles, such as noodles with gravy, Zhajiang Noodles, beef noodles and egg noodles, which have a unique flavor.

On the day of summer solstice, farmers will roll pancakes, bake them, add vegetables, pods, tofu and bacon, eat them after ancestor worship, commonly known as "summer solstice cakes" or give them to relatives and friends. There is a folk proverb that "eating noodles on the solstice in summer will shorten the day".

2. Worship gods and ancestors

China is a big agricultural country, and most of the festivals celebrated are related to agriculture. The solstice in summer is the harvest season of wheat. Since ancient times, people have had the custom of celebrating harvest and offering sacrifices to ancestors at this time in order to pray for a good year. Therefore, the summer solstice, as a festival, was included in the ancient ritual of offering sacrifices to the gods.